8x+x=9-3x

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Solution for 8x+x=9-3x equation: 



8x+x=9-3x

We move all terms to the left:

8x+x-(9-3x)=0

We add all the numbers together, and all the variables

8x+x-(-3x+9)=0

We add all the numbers together, and all the variables

9x-(-3x+9)=0

We get rid of parentheses

9x+3x-9=0

We add all the numbers together, and all the variables

12x-9=0

We move all terms containing x to the left, all other terms to the right

12x=9

x=9/12

x=3/4

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